If you simply remove a widget or menu item instead of graying it out then it is much more difficult for your users to build an accurate mental model because they only know what is currently available to them, and not what is not available.
If you simply remove a widget or menu item instead of graying it out then it is much more difficult for your users to build an accurate mental model because they only know what is currently available to them, and not what is not available.
因为他们只现在对他们是可得的东西,所以如果你只是除去一个小装置或菜单项目而不是使它变灰色出那么你的使用者建立一个正确的心智模型是更加困难的,和不什么不是可得的。